1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6011170615306403a7a9999700f5f9443be33cb05d45402f0e1ef91672d53c0d. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05fd7fb5-809b-4fd5-8728-2fa61a308241.json and https://artists.proofprofile.net/proofs/artist/05fd7fb5-809b-4fd5-8728-2fa61a308241.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19becf39d8de23515b76648e08f3d84873f1a4ec22be7016c58c19af74d8f42b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX281902456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32df3f9b075ecaffe4b63dced257d8880041329d4927345536ec6d9e086d8454. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNZ632301568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cdb9339e4c2f5e93fe63f21bd6d202856422f945945a0ca20775fcd527c7ec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNZ632301586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0e2a55d39212f133ab87f858c6dada344f47ef53bab70b22f599ced32ce06. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNZ632301585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281966d262b5dcaa4feb0c72760b73de0a8dcbd55ce878b0eee2d3a4edabe9fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732220795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752dae05ade50993feeffbb02f79b446b275a79ecd0552535d4cd8041cc3b490. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732286307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac16687e93e62d209520a49bb5d4e35c99c7981f06be572494aa1288c19c989. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731866130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790416025f15201bde35ba4e3e78d38d951bf594fff3a129224a223e74fd27e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR26V2028490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d35bef869e8e8477e7b5eaee8237b169ed78aa98d7d6535749a1dccec1fd8a0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR26V2028491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030ef617df71b980e45fd75aebacf5d2c4858646489b99524372324f194ebc3c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR26V2028492.
方向感 (电视剧《你是我的答案》浪漫主题曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88fbe5658174e6865eb315efba1a2c41c4d4d37a5faa53313880671f9b5bfd1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732225583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eca0437ef7b09fc3768ea108704b4908771612e5cfc66b7e8e56ac050fa748. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732235606.
让世界领教我的名字 - 网剧《同学两亿岁》人物曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c259b3a055f182100abd9cad3bd8f116dd3741f6acfd3ae255a7c38d2bb231. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCT51717793.
让世界领教我的名字 - 网剧《同学两亿岁》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404d4f7a33a65ffb0b4132b0a12e4a3f7165e2586136ff573e053b1a5e5e031. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCT51717794.
最想保存的回忆 - 网剧《同学两亿岁》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad405d1136318920a3184f31db0c29e9fa37644596bc774688ffce0f392bd355. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCT51717797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e75a6c011ff4a9ddc59e431e11fc4b66116df98972916ff8fe41a3d5f05c7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732236437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fde66ea40cca808337b87ad6e4d5b809edb9f5311964e5fc9145025b72318d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732236442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3eb43cbca972a230c518639b1beef693a52a1f56ce3c3057c5d79a019cb7a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732236444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d26e8f8a059b15db8678e3a38289f3a3314493c2e9aae464c214bb4894073c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732236446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8608a2b4c240643b861a5a1769cb93f1cb07f4cbb7b2e6b1dd0bb4fe73d04bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732236447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f349b248fa142b224e182f6234eb7da59edde4c2f90a771776758aaccf00120. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732236449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf231baa64b8b908c53900e52222a9be8dd13d5d86b5823ef59977bf7d9b0c88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731619937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08fd4368eda4cb88e15069df24a3c4b09a3284383d7d89e2df2b8a16c4c61dd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732235880.